conversion:Repeat_previous_if_empty_column

See conversion:Enhancement.

Some abbreviations are used in CSVs that are authored by humans in Excel. One such abbreviation is to leave empty cells when the value repeats. These implicit values can be filled in by using the RepeatPreviousIfEmptyEnhancement. If, after passing the onlyIfCol test, a value is not present in a CSV row, use the value from the previous row.

e.g., Dataset 1623

@prefix conversion: <http://purl.org/twc/vocab/conversion/> .
@prefix :           <http://logd.tw.rpi.edu/source/data-gov/dataset/1623/version/2009-May-18/params/enhancement/1/> .

:dataset a void:Dataset;
   conversion:base_uri           "http://logd.tw.rpi.edu"^^xsd:anyURI;
   conversion:source_identifier  "data-gov";
   conversion:dataset_identifier "1623";
   conversion:dataset_version    "2009-May-18";
   conversion:conversion_process [
      a conversion:RawConversionProcess;
      conversion:enhancement_identifier "1";
      conversion:enhance [
         ov:csvRow        7;
         a conversion:HeaderRow;
      ];
      conversion:enhance [
         ov:csvCol        1;
         conversion:label "Region";
         conversion:range rdfs:Resource;
         a conversion:Repeat_previous_if_empty_column;
      
         a conversion:TypedResourcePromotion;
         conversion:range_name "Region";
      ];

Other datasets that benefit from this structural parameter include Dataset 311, and Dataset 10030.

What datasets use this enhancement?

PREFIX conversion: <http://purl.org/twc/vocab/conversion/>
SELECT distinct ?dataset
WHERE {
  GRAPH <http://logd.tw.rpi.edu/vocab/Dataset>  {
    ?dataset a void:Dataset;
      conversion:conversion_process [
        conversion:enhance [
           a conversion:Repeat_previous_if_empty_column;
        ];
      ]
    .
  }
}

See also

• conversion:HeaderRow to specify the row that contains header data (or [dimensional values](Converting with cell based subjects)).
• conversion:DataStartRow to specify the first (inclusive) row that contains data.
  • conversion:Only_if_column to omit processing a row if a certain column's value is missing.
  • conversion:Repeat_previous_if_empty_column
  • conversion:repeat_previous to specify a value that indicates repetition (instead of just an empty value).
  • conversion:Omitted - to specify a column to omit.
• conversion:DataEndRow to specify the last (inclusive) row that contains data.